Ergonomic seating system, tilt-lock control and remote powering method and appartus

ABSTRACT

A system for guiding a user while changing the juxtaposition of one furniture component with respect to another furniture component on a furniture assembly, the system comprising a sensor for sensing the position of the first component with respect to the second component, an indicator for indicating when the position of the first component with respect to the second component should be changed by the user from a current position to another position, a control mechanism activatable by the user for changing the position of the first component with respect to the second component and a processor programmed to use sensor signals to track the position of the first component and to provide periodic first reminders to change the position of the first component from the current position to another position, the processor continuing to track the first component position as a user moves the first component toward the another position and, when the repositioning stops short of the another position, controlling the indicator to generate a first alert.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is related to and claims priority to U.S. provisionalpatent application No. 62/409,041, filed on Oct. 17, 2016, which isentitled “Ergonomic Seat System” which is incorporated herein in itsentirety by reference.

BACKGROUND OF THE DISCLOSURE Field

The present disclosure relates generally to powered furniture. Moreparticularly, the present disclosure relates to powered rolling chairsthat include electrical components and systems for providing suchonboard components with remote power.

Chair Movement:

A common misunderstanding is that sitting upright and straight in anoffice chair is the right way to sit at all times. To the contrary, manyergonomics experts have said “your best position is your next position”indicating that alternating between sitting upright and recliningslightly and other positions is ideal. This is because staying fixed inany one position can cause fatigue, lead to slouching, discomfort orother negative consequences. Sitting in an upright posture for a longperiod with the person's thigh to trunk angle at or near 90 degrees cancause a person's pelvis to rotate backwards, which in turn, flattens thenormal lumbar curve of the user's spine. Changing the curvature of thespine in this manner has been found to significantly increase the lumbardisc pressure by as much as 40% compared to the disc pressure whenstanding. This increase in disc pressure can cause fatigue and lowerback pain, and even pinched nerves.

Lower back pain continues to be among the most common complaints foradults, and is one of the most common reasons given for doctor visits:

According to a University of Missouri—Columbia School of HealthProfessions report, there is an 80% lifetime prevalence of low back painfor adults. At any given time, 20-30% of people will have back pain, andback pain is usually recurrent and often progressive.

A spinehealth.com poll showed that 70% of all respondents reportincreased lower back pain after sitting at work (15% report no changeand 15% report improved back pain—i.e., less).

There are important benefits to change position while seated. The simpleact of moving allows the user's muscles to effectively help pump bloodthroughout the user's body. Also, movement of the user's spine (forinstance when reclining) can nourish and support health of discs of theuser's vertebrae, and body movement of a user's joints is generallypositive for joints and ligaments. All of this can support comfort and areduction in the likelihood or incidence of back pain.

In order to support users in changing positions regularly while seated,many current ergonomic chairs are designed with several differentadjustments. However, once a chair is initially adjusted to fit a user,many users forget, or simply do not make use of the adjustment featuresfor the purposes of changing the position during the day, due to lack ofknowledge on how to make the adjustments, a lack of understanding of thebenefits or due to being preoccupied with other priorities.

Interestingly, often seated people seek to achieve different posturevariations without adjusting the chair which can also have negativeconsequences because the chair is not properly supporting their body asdesigned. A typical seated user may try to position him or herself toany of the following three distinct modes of sitting while performingwork at a desk:

-   -   Forward sitting: leaning slightly forward in the chair, often        used for performing work on the plane of a desk or for        interacting with office equipment;

Sitting upright: with the back supported by the back of the chair, whichis a general purpose position accommodating most tasks

-   -   Slightly reclined sitting: used for instance in conversation,        telephoning, keyboarding, and mousing. Surveys indicate that it        is a preferred work posture for many people; and    -   Deeply reclined sitting: often used for resting, reading, and,        in some cases, keyboarding.

Many ergonomic chairs require activation of levers and buttons to changemost aspects of a seated position. Even reclining typically requiresactivation of a lever to release the recline-lock so that a user hassolid back support when seated upright. The need for knowledge of how toadjust the chair and the requirement of the user's active management ofthe process all reduce the likelihood of a changes being madefrequently.

U.S. Pat. No. 5,556,163 of Rogers, III, et al. discloses a chair thatemploys several actuators for selectively moving several differentcomponents, such as height, and recline, etc. The main intent of thepowered drivers is to provide ease for the user to quickly make fineadjustment to his or her chair. This reference does further mention thatthe actuators may be automatically driven either randomly or following aschedule to make minor movements to each component to avoid userfatigue.

Although the chair disclosed by U.S. Pat. No. 5,556,163 does introduceautomatically moving the different components of a chair to avoidfatigue, the movements are only meant to be minor and such movementswould not be sufficient to prevent back strain that stems from elevatedpressure on the user's spine nor correct a flattened lumbar curve.

U.S. Pat. No. 7,896,436 of Kurrasch et al. discloses a chair thatincludes powered actuators and sensors to automatically sense the weightof a user and to use this information to adjust the chair components forthe best fit. This chair also includes provisions for recognizingdifferent users and automatically adjusting the different settings basedon the identity of a seated user.

Although the chair of Kurrasch et al. does utilize powered actuators tomove various chair components, it moves the components based on theuser's weight for comfort and correct fit and does not automaticallymove the components for the purpose of alleviating spinal pressure andcorrecting a flattened lumbar curve to mitigate back strain andassociated pain.

Reclining Seating Movement:

Generally, conventional adjustable seating includes a seat and apivotally attached backrest which can be reclined, as desired. Therecline feature is usually spring-biased up to a hard stop so that whenselected, the user may lean back against the backrest and gentlyrecline, continuously supported by the spring-bias, up to the hard stop.How far back the backrest reclines (i.e., the angular location of thehard stop) is usually adjustable from a vertical position (orapproximately vertical), where the user does not want the backrest torecline at all and prefers to have full support when he or she leansback (sitting up straight). At which recline angle the hard stop occursis sometimes adjustable by the user, to different degrees of recline(usually maxing out at around 40 degrees from the vertical).

A problem with the recline feature is that many people don't end upusing it. They want to be able to lean back and remain solidly upright.To this end, applicants have found that many users prefer to just lockoff the recline feature, leaving the backrest effectively fixed in thefull upright position. This is problematic because many ergonomicsexperts have said that one's “best position is his/her next position”indicating that alternating between sitting upright and recliningslightly and other positions is ideal. This is because staying fixed inany one position can cause fatigue, lead to slouching, discomfort orother negative consequences. Sitting in an upright posture for a longperiod with the person's thigh to trunk angle at or near 90 degrees cancause a person's pelvis to rotate backwards, which in turn, flattens thenormal lumbar curve of the user's spine. Changing the curvature of thespine in this manner has been indicated to significantly increase thelumbar disc pressure by as much as 40% compared to the disc pressurewhen standing. This increase in disc pressure can cause fatigue andlower back pain, and even pinched nerves.

Lower back pain continues to be among the most common complaints foradults, and is one of the most common reasons given for doctor visits:

According to a University of Missouri—Columbia School of HealthProfessions report, there is an 80% lifetime prevalence of low back painfor adults. At any given time, 20-30% of people will have back pain, andback pain is usually recurrent and often progressive.

A spinehealth.com poll showed that 70% of all respondents reportincreased lower back pain after sitting at work (15% report no changeand 15<}{, report improved back pain—i.e., less).

There are important benefits to changing position while seated. Thesimple act of moving can allow the user's muscles to effectively helppump blood throughout the user's body. Also, movement of the user'sspine (for instance when reclining) can nourish and support health ofdiscs of the user's vertebrae, and body movement of a user's joints isgenerally positive for joints and ligaments. All of this can supportcomfort and a reduction in the likelihood or incidence of back pain.

In order to support users in changing positions regularly while seated,many current ergonomic seating structures of the type used in an officeenvironment are designed with several different adjustments andfeatures. However, once a seating structure is initially adjusted, manyusers forget, or simply do not make use of the adjustment features forthe purposes of changing the position during the day, due to lack ofknowledge on how to make the adjustments, a lack of understanding of thebenefits or due to being preoccupied with other priorities.

Removable Feature-Module:

Conventional adjustable seating structures usually include many featuresand are quite expensive. Some of these seating structures may besomewhat customizable, allowing the customer certain choices whenordering, such as fabric type and color, adjustable hand rests,adjustable recline. The Aeron® chair by Herman Miller of Zeeland, Mich.includes a lumbar support insert which is designed to provide two levelsof firmness and support, depending on the orientation it is secured tothe rear of the backrest.

Applicants have recognized a need to easily provide additional featuresto an adjustable seating structure, even as an after-market item.

Sit-Stand Desk with Remote Height Management:

Sit stand desks are getting more and more popular. Large companies arerecognizing the health benefits and associated health-related costsavings in encouraging their employees to follow healthy lifestyles,including the use of sit/stand desks while at work.

Although it has been proven that use of such sit/stand desks arebeneficial to one's health, it is not uncommon for the average user touse the standing feature of these height-adjustable desks less overtime. In some cases, the user never uses the standing feature. This canbe attributed to various reasons including that some users never knewthe desk could move up and down and just use it as a sit-only desk andthat some users are not being reminded to stand, forget to stand, orjust do not break the habit of sitting. Most sit/stand desks areconsidered “non-intelligent” in that they are just mechanical structuresthat include a worktop that can be raised or lowered as desired by itsuser. In such desks, there is no intelligent system tracking when andfor how long the worktop is positioned at a sitting height or a standingheight and therefore health status and benefits cannot be meaningfullytracked. Some new versions of sit/stand desks are classified as “smart”desks because they do keep track of exact height usage, facilitate,motivate and remind users to change positions and some even make theheight changes automatically to follow a health-schedule customized foreach user. One such desk is sold by a company called Stirworks, locatedin Pasadena, Calif. 91103. However, even with smart sit/stand desks,some users do not respond to the software effectively losing theassociated health benefits, or respond less frequently over time.

System for Charging Seat Structures:

There has been a strong effort in the furniture industry to provideelectrically powered accessories to rolling-type office chairs. Lights,buzzers, vibration, heaters, etc. have been suggested and in some cases,developed to a commercial product. A common problem shared by all ofthese developments is how to provide power to a mobile chair.

SUMMARY OF THE DISCLOSURE

It is therefore a primary object of the present disclosure to overcomethe deficiencies of the prior art.

It is another object of the disclosure to provide a chair that allowsthe user to quickly and easily reposition.

It is another object of the disclosure to provide a chair that remindsthe user to reposition while seated in the chair.

It is another object of the disclosure to provide a powered chair thatautomatically repositions components of the chair to alleviate spinalpressure and correct a flattened lumbar curve at prescribed times tomitigate back strain and associated pain.

Some aspects of the present disclosure also relate generally to poweredfurniture. More particularly, the present disclosure relates to poweredadjustable seating that includes moveable components.

It is therefore a primary object of the present disclosure to overcomethe deficiencies of the prior art.

It is another object of the disclosure to provide a seating structurethat allows the user to quickly and easily reposition.

It is another object of the disclosure to provide a seating structurethat reminds the user to reposition while seated in the seatingstructure.

It is another object of the disclosure to provide a powered seatingstructure that automatically repositions components of the seatingstructure to alleviate spinal pressure and correct a flattened lumbarcurve at prescribed times to mitigate back strain and associated pain.

It is therefore a primary object of the present disclosure to overcomethe deficiencies of the prior art.

Some aspects of the present disclosure further relate generally toimprovements to powered furniture. More particularly, the presentdisclosure relates to powered adjustable seating and poweredheight-adjustable sit-stand desks.

It is therefore a first object of this disclosure to overcome thedeficiencies of the prior art.

It is a second object of the disclosure to provide a means to helpencourage continued use of a sit/stand desk.

1) Batteries:

Batteries can, in most cases, be used to power such features of a chair,but of course these batteries eventually need to be replaced orrecharged. Regularly changing batteries would usually be consideredimpractical and a burden, especially in a large company with many desksand chairs. Such regular maintenance requirements would likely result inthe powered features to be eventually ignored and unused.

Alternatively, a chair requiring power could be tethered with a powercord to continuously provide the required power, but such a cord wouldlikely become entangled and damaged during normal use of the chair, orlook unsightly. Similar to changing batteries, plugging in a power cordeach night would usually be considered a burden and impractical.

2) Generators and Solar Panels:

Another method to bring power to a mobile powered chair is to use themovement of the chair itself to generate power. U.S. Pat. No. 8,016,351discloses such as system wherein electric generators are mechanicallyconnected to at least one of the several caster wheels.

In use, as the user moves the chair on the floor, the rotating casterswill in turn rotate the generators, which will generate power to chargeonboard batteries. Unfortunately, a typical user seated in a chair doesnot roll the chair around enough during normal use to generatesufficient power to be effective or practical. Also, reverse EMF createdin a generator generating power would create noticeable breaking torquemaking it very difficult and awkward for the user to move the chairaround. The U.S. Pat. No. 8,016,351 patent also suggests using a solarpanel on the back of the chair to help charge onboard batteries. Thismay help provide some or all required power for the chair, but suchpanels are expensive, fragile and require strong direct or ambient lightto work effectively and generally are less efficient in environmentsthat use low-power fluorescent lighting or indirect lighting (reflectedlight).

US Patent Publication No. 2013/0106155 discloses a chair having aseating structure that is supported by a central vertically disposedpiston. The seating structure is designed to vertically displace inresponse to a seated person's weight, leveraging the up and down linearmovement to generate electricity. It is also known to convert otherchair-movements by a seated user into electricity, such as the recliningmovement. This generated power is then used to power onboard electronicsand/or batteries. Such methods often do not deliver enough power toconsistently power desired functions.

3) Wireless Charging:

Power can also be transmitted wirelessly. Wireless technologies arethose in which energy is transferred between components without wiredconnections such as sockets and plugs.

These wireless technologies generally include radio frequency (RF)transfer, induction, conduction and acoustic energy transmissiontechnology. Exemplary wireless energy sources are disclosed in U.S. Pat.Publ. Nos. 2007/0182367, 2009/0072782, 2008/0246215, 2007/0194526, and2004/0195767, which are incorporated herein by reference. In RF transfertechnology, a source circuit generates an RF signal which is received bya second circuit. Energy is absorbed from the signal by the secondcircuit. RF energy can be transferred over a distance of several feetalthough the RF signal degrades rapidly as the distance from the sourceincreases. Acoustic energy is similar to RF energy in that energypropagates multi-directionally.

In induction technology, a source, or primary, coil generates a magneticfield which induces current in a second, or secondary, coil. The area inwhich inductive energy may be received, referred to as a “hot-spot,” isfairly localized adjacent the primary coil. Typically, in theembodiments disclosed herein, the primary coil will be integrated intoan article of furniture, such as a desk, or a floor mat. A wirelessdevice including the secondary coil may receive power from the primarycoil by induction of electrical current in the secondary coil when thesecondary coil is brought into proximity with the primary coil. Thecurrent generated in the secondary coil may be used to power theelectronic device, or charge batteries in the electronic device. Acontroller produces a signal to power the primary coil at a modulatedfrequency. Information may be transferred by the signal to the secondarycoil and then extracted by the electronic device being charged. Theelectronic device may include passive circuits and/or wirelesscommunication circuits to transmit information back to the controller,thus establishing a “hand-shake” connection, which the controller mayuse to modulate the signal.

The use of induction technology is indeed promising, but a commonproblem with this otherwise elegant system is that the secondary coilmust be accurately aligned over the primary coil for the system to beeffective and the two coils must be positioned immediately adjacent toeach other for effective power transmission to occur. This would requirethe office worker to carefully roll their office chair to a specificspot on their chair-mat each night before leaving so that the two coilsalign. It is not likely that a typical office worker would perform thistask each day with any confidence or accuracy, especially when they aretired and must hurry to catch their train home. If the chair is notregularly charged, the onboard batteries will quickly lose their chargeand the electrically powered features of the chair will cease tooperate. If this happens, the user will quickly become frustrated andwould likely lose interest in using the otherwise beneficial features ofthe chair.

4) Conductive Systems:

In conduction technology, an electrically conductive contact pad ismounted at a stationary location and another is secured to the mobilechair. The two contact pads are arranged so that they can be selectivelyaligned during a charging event. In such instance, the two contact padsare positioned so that they make contact and so that power can betransferred across the connection. The contact pads are typically flatelongate rectangular-shaped plates positioned in parallel. The polarityof each pad may be selected by controlling circuitry based in part onfeedback from the contacts. Such controlling circuitry typicallyincludes voltage and current regulators and features designed to protectthe electronic devices and the controllers.

It is therefore a primary object of the present disclosure to overcomethe deficiencies of the prior art.

It is another object of the disclosure to provide a system thateffectively and efficiently provides power to a rolling-type chairwithout compromising the free-movement and function of the chair.

The features of this disclosure, and the manner of attaining them, willbecome more apparent and the disclosure itself will be better understoodby reference to the following description of the disclosed embodimentstaken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

The invention can be more fully understood from the following detaileddescription taken in conjunction with the accompanying drawings, inwhich:

FIG. 1 is a front perspective view of an exemplary ergonomic chair,showing various components and movement arrows, in accordance with thepresent disclosure;

FIG. 2 is an operational schematic of the control system of the chair ofFIG. 1, in accordance with the present disclosure;

FIG. 3 is a rear perspective view of the exemplary ergonomic chair,showing various components and movement arrows, in accordance with thepresent disclosure;

FIG. 4 is a rear perspective view of an exemplary ergonomic seatingstructure, showing various components, in accordance with the presentdisclosure;

FIG. 5 is a side elevation view of the seating structure of FIG. 4,showing the backrest reclined, in accordance with another embodiment ofthe disclosure; and

FIG. 6 is a schematic showing various electrical components, inaccordance with the disclosure;

FIG. 7 is a rear plan view of the seating structure of FIG. 4, inaccordance with the present disclosure;

FIG. 8 is a rear perspective view of the seating structure of FIG. 7,showing the module access door open and the module being removedtherefrom, in accordance with the present disclosure;

FIG. 9 is a partial perspective view of the seating structure of FIG. 7,showing details of an add-on tilt-control unit prior to being secured tothe seating structure, in accordance with the present disclosure;

FIG. 10 is a partial perspective view of the seating structure of FIG.9, showing details of the add-on tilt-control unit secured to theseating structure, in accordance with the present disclosure;

FIG. 11 is a top plan view of an exemplary matrix of installed sit-standdesks showing connection to a controller, according to the presentdisclosure;

FIG. 12 is a perspective view of the exemplary sit-stand desks of FIG.11, showing each desk having a worktop positioned at a different height,according to the present disclosure;

FIG. 13 is a perspective view of the exemplary sit-stand desks of FIG.11, showing the worktop of each desk in the matrix positioned at acommon height, according to the present disclosure;

FIG. 14 is an operational schematic showing the different componentsused to operate various electrical functions of a chargeable mobilechair, according to the present disclosure;

FIG. 15 is a perspective view of a mobile chair located on a chair-mat,showing details of an induction charging system, according to thepresent disclosure;

FIG. 16 is a perspective view of a portion of the mobile chair of FIG.15, showing a chair base supporting the induction charging system ofFIG. 15 with the system shown in a retracted and stowed position,according to the present disclosure;

FIG. 17 is an elevation side view of the induction charging system ofFIG. 16 with the system shown in a retracted and stowed position,according to the present disclosure;

FIG. 18 is an elevation side view of the induction charging system ofFIGS. 16 and 17 with the system shown in an extended and deployedcharging position, according to the present disclosure; and

FIG. 19 is a partial close up sectional view of a floor mat, showingdetails of registration lines that are used to help locate the positionof the chair, according to the present disclosure.

DETAILED DESCRIPTION OF THE DISCLOSURE

The various aspects of the subject disclosure are now described withreference to the drawings, wherein like reference numerals correspond tosimilar elements throughout the several views. It should be understood,however, that the drawings and detailed description hereafter relatingthereto are not intended to limit the claimed subject matter to theparticular form disclosed. Rather, the intention is to cover allmodifications, equivalents, and alternatives falling within the spiritand scope of the claimed subject matter.

In the following detailed description, reference is made to theaccompanying drawings which form a part hereof, and in which is shown byway of illustration, specific embodiments in which the disclosure may bepracticed. These embodiments are described in sufficient detail toenable those of ordinary skill in the art to practice the disclosure. Itshould be understood, however, that the detailed description and thespecific examples, while indicating examples of embodiments of thedisclosure, are given by way of illustration only and not by way oflimitation. From this disclosure, various substitutions, modifications,additions rearrangements, or combinations thereof within the scope ofthe disclosure may be made and will become apparent to those of ordinaryskill in the art.

In accordance with common practice, the various features illustrated inthe drawings may not be drawn to scale. The illustrations presentedherein are not meant to be actual views of any particular method,device, or system, but are merely idealized representations that areemployed to describe various embodiments of the disclosure. Accordingly,the dimensions of the various features may be arbitrarily expanded orreduced for clarity. In addition, some of the drawings may be simplifiedfor clarity. Thus, the drawings may not depict all of the components ofa given apparatus (e.g., device) or method. In addition, like referencenumerals may be used to denote like features throughout thespecification and figures.

Information and signals described herein may be represented using any ofa variety of different technologies and techniques. For example, data,instructions, commands, information, signals, bits, symbols, and chipsthat may be referenced throughout the above description may berepresented by voltages, currents, electromagnetic waves, magneticfields or particles, optical fields or particles, or any combinationthereof. Some drawings may illustrate signals as a single signal forclarity of presentation and description. It will be understood by aperson of ordinary skill in the art that the signal may represent a busof signals, wherein the bus may have a variety of bit widths and thedisclosure may be implemented on any number of data signals including asingle data signal.

The various illustrative logical blocks, modules, circuits, andalgorithm acts described in connection with embodiments disclosed hereinmay be implemented as electronic hardware, computer software, orcombinations of both. To clearly illustrate this interchangeability ofhardware and software, various illustrative components, blocks, modules,circuits, and acts are described generally in terms of theirfunctionality. Whether such functionality is implemented as hardware orsoftware depends upon the particular application and design constraintsimposed on the overall system. Skilled artisans may implement thedescribed functionality in varying ways for each particular application,but such implementation decisions should not be interpreted as causing adeparture from the scope of the embodiments of the disclosure describedherein.

In addition, it is noted that the embodiments may be described in termsof a process that is depicted as a flowchart, a flow diagram, astructure diagram, or a block diagram. Although a flowchart may describeoperational acts as a sequential process, many of these acts can beperformed in another sequence, in parallel, or substantiallyconcurrently. In addition, the order of the acts may be re-arranged. Aprocess may correspond to a method, a function, a procedure, asubroutine, a subprogram, etc. Furthermore, the methods disclosed hereinmay be implemented in hardware, software, or both. If implemented insoftware, the functions may be stored or transmitted as one or moreinstructions or code on a computer-readable medium. Computer-readablemedia includes both computer storage media and communication mediaincluding any medium that facilitates transfer of a computer programfrom one place to another.

It should be understood that any reference to an element herein using adesignation such as “first,” “second,” and so forth does not limit thequantity or order of those elements, unless such limitation isexplicitly stated. Rather, these designations may be used herein as aconvenient method of distinguishing between two or more elements orinstances of an element. Thus, a reference to first and second elementsdoes not mean that only two elements may be employed there or that thefirst element must precede the second element in some manner. Also,unless stated otherwise a set of elements may comprise one or moreelements.

As used herein, the terms “component,” “system” and the like areintended to refer to a computer-related entity, either hardware, acombination of hardware and software, software, or software inexecution. For example, a component may be, but is not limited to being,a process running on a processor, a processor, an object, an executable,a thread of execution, a program, and/or a computer. By way ofillustration, both an application running on a computer and the computercan be a component. One or more components may reside within a processand/or thread of execution and a component may be localized on onecomputer and/or distributed between two or more computers or processors.

The word “exemplary” is used herein to mean serving as an example,instance, or illustration. Any aspect or design described herein as“exemplary” is not necessarily to be construed as preferred oradvantageous over other aspects or designs.

Furthermore, the disclosed subject matter may be implemented as asystem, method, apparatus, or article of manufacture using standardprogramming and/or engineering techniques to produce software, firmware,hardware, or any combination thereof to control a computer or processorbased device to implement aspects detailed herein. The term “article ofmanufacture” (or alternatively, “computer program product”) as usedherein is intended to encompass a computer program accessible from anycomputer-readable device, carrier, or media. For example, computerreadable media can include but are not limited to magnetic storagedevices (e.g., hard disk, floppy disk, magnetic strips . . . ), opticaldisks (e.g., compact disk (CD), digital versatile disk (DVD) . . . ),smart cards, and flash memory devices (e.g., card, stick). Additionallyit should be appreciated that a carrier wave can be employed to carrycomputer-readable electronic data such as those used in transmitting andreceiving electronic mail or in accessing a network such as the Internetor a local area network (LAN). Of course, those skilled in the art willrecognize many modifications may be made to this configuration withoutdeparting from the scope or spirit of the claimed subject matter.

Chair Movement:

By way of overview, applicants have realized that it is desirable for anoffice chair to allow its user freedom of movement with little to noeffort, while providing the user required support for health and, ofcourse sufficient comfort to encourage continued use. There are severalembodiments to this disclosure that improve upon the prior art and offerunique features to the rolling-type office chair.

The embodiments detailed below are preferably directed to ergonomic typechairs, typically used in offices and usually including wheels.Applicants have determined from research that a seated user should moveregularly while seated to encourage a healthy disposition. As part ofthese regular movements, the user should:

a) Reduce lumbar strain by reclining in the chair;

b) Sitting upright with lowered thighs (provided by tilting the frontedge of the seat down);

c) Sitting upright with raised thighs; and

d) Standing at their desk.

The user should ideally cycle through the above positions every 20 to 30minutes to assist in preventing lower back pain and encourage ahealthier disposition. When the user reclines, the spine is allowed tomore easily return to a more normal curvature. This reduces or removespressure on the discs of the user's vertebrae, which greatly reduces thechance of lower back pain. Of course, the user may not be able to aseffectively work while fully reclined so other positions are necessary.Sitting upright with lowered thighs also increases the thigh-to-torsoangle, which again helps the spine more easily attain a more normalcurvature, which like reclining reduces disc pressure, but not as muchas when fully reclined. Sitting upright with raised thighs may providethe most upright support for the user to work at a desk, but thisposition should not be used exclusively due to higher strain on discs.Finally, standing at regular and controlled intervals improves one'shealth.

Referring to FIG. 1, and according to a first embodiment of the presentdisclosure, a chair 510 is provided having a dolly structure 512, fromwhich a post 514 upwardly extends. A yoke assembly 516 includes avertically disposed piston 518 which is slidably secured to post 514, asunderstood by those of skill in the art. A back support assembly 520 ispivotally secured to a portion of yoke assembly 516. A back cushion 522is pivotally secured to a portion of back support assembly 520. A seatcushion 524 is pivotally secured to a portion of yoke assembly 516. Asis well known by those skilled in the art, dolly structure 512 includes5 radially disposed legs 526, each having a caster wheel 528 pivotallyattached to a remote end 530. A left and right side armrest 529 aremounted to yoke assembly 516 by a telescoping connection and areselectively vertically displaceable.

According to the disclosure, post 514 is slidably verticallydisplaceable (as shown by arrow 532 in FIG. 1) between a predeterminedlow position and a predetermined high position and is used as inconventional ergonomic chairs to raise and lower seat cushion 524 andall other connected parts, as desired by the user. According to thedisclosure, post 514 is selectively movable to any point between low andhigh position using an electrically powered drive, such as anappropriate high-torque motor (not shown) or a magnetic linear drive, adigital high-torque stepper motor, and any required gearing or torquemultiplier, as required to provide sufficient force to raise and lowerthe expected load safely and efficiently.

An important aspect of this disclosure is that electrically poweredmotor drives, not shown in FIG. 1, but referred to in FIG. 2 as “558 a,558 b, 558 c, such as high-torque motors, servo motors with opticalencoder feedback, electromagnetic linear drives, screw jack actuators orrotary actuators with hall sensor position feedback, a digitalhigh-torque stepper motor or other such devices are used to selectivelypower all linear, tilting, and pivotal movements used throughout chair510, including pivotal movement of back support assembly 520, indicatedin FIG. 1 by arrow 534, pivotal movement of back cushion 522, indicatedby arrow 536 in FIG. 1, tilting of lower seat cushion 524, indicated inFIG. 1 by arrow 538, lumbar support movement of back cushion 522, notshown by an arrow, and vertical displacement of either left or rightside armrest 529, indicated by a single arrow 540, in FIG. 1.

Referring to FIG. 2, a schematic shows controller components used inaccordance with the present disclosure, including a microprocessor 550,a battery 552, wireless communication 554, a motor driver circuit 556,drive motors 558 a, 558 b, 558 c sensors 560 and user input 562.Microprocessor 550 is electrically connected to wireless communication554, motor drive circuit 556, sensors 560 and user input 562. Battery552 is shown connected to microprocessor 550 in FIG. 2 to provide powerto that component, but it should be understood that battery 552 iseffectively electrically connected to and powers all components, asnecessary, and as understood by those skilled in the art.

Wireless communication 554 may be any type, such as Wi-Fi_(——————)33, orBluetooth® and is used to communicate information between chair 510 anda remote location. According to one aspect of this embodiment of thedisclosure, chair position type and duration information (called“use-information”) over a period of time can be collected, stored inonboard memory (not shown) and transmitted (following a schedule) to aremote location for review and storage. This use information will helpdetermine how well the user is using his or her chair, establishing a“use-history profile.” This information could be used, for example toensure that the user is following a position-variation schedule with thehighest health benefits and comfort. If not, a particular user could besent encouragements, reminders, and instructions regarding how toproperly set up and operate their chair. Wireless communication 554 canalso be used to connect (or pair) to other smart devices, such as asmart phone, or an adjacent sit/stand desk, such as the one sold by acompany called Stirworks Inc, located in Pasadena, Calif. 915103. Indoing so, the sit/stand desk controller could merge the sit-positionvariation schedule with the sit/stand desk position schedule. Currently,sit/stand desks, if they are “smart,” do not know what the user is doingonce they are in the sit mode. By linking the control system of thechair, according to this disclosure, to the control system of a smartdesk, such as the Stir Kinetic Desk, a much larger picture of theposture and health habits of each user at a workplace may be realizedand used to benefit both the user and the company. Applicants' hereinincorporate by reference patent application, publication number:US20140096706 A1, published Apr. 10, 2014 with a priority filing of Oct.10, 2010, entitled: “Height-Adjustable Support Surface and System forEncouraging Human Movement and Promoting Wellness” discloses such asmart sit/stand desk. The content of this publication is incorporated byreference in its entirety as if the entire patent publication contentwere reprinted in this current application.

As explained in greater detail below, microprocessor 550 controls motordriver circuit 556, which in turn controls the operation of any ofseveral motors 558 a, b, c, as required by either a preset positionvariation schedule, stored in on-board memory (not shown), or asinstructed by user input controls 562 (buttons pressed by a user)—manual control mode.

According to this embodiment of the disclosure, sensors 560 are used tocommunicate accurate motor drive positional information tomicroprocessor 550. For example, should a drive motor 558 a, b, c beactivated to vertically displace armrests 529 from a first height to adesired second height, sensors 560 would “read” exact positioninformation and would send a signal to microprocessor 550 when motordrive 558 a, b, c reaches the desired height, in this example. Ofcourse, a variety of different types of sensors could be used to providesuch accurate positional information, a preferred type would be the useof actuator/motors with Hall Effect sensor, whose operation is wellknown by those skilled in the art and therefore not explained in anygreat detail here. Briefly, as the motor rotates, magnets mountedasymmetrically pass by a sensor and the incremental change in magneticfield is detected and occurrences counted. This information is then usedto very accurately control the displacement of any component (such as anarmrest 529) attached to the drive mechanism. Also, sensor 560 couldinclude a safety shutoff that indicates that the mechanical movement hasphysically reached the end of its travel and any further movement couldcause damage. Sensor 560 could also include switches and sensors thatdetect user presence on the chair and its components, such as astrategically positioned pressure switches could be used to detect notonly that a user is simply sitting on seat cushion 524, but how theperson is actually sitting. For example, sensor information could learnthat the user is seated on seat cushion 524 and leaning forward since asensor located in the front of the seat is reading a high-than normalpressure reading and that the back cushion 522 is not reading anypressure. The microprocessor 550 could compare the incoming sensorreadings with known (and stored in memory, not shown) pressure ranges todetermine how a particular “sensor signature” conveys a particularseated position. Alternatively, microprocessor 550 could learn “normal”positional information by reading sensor information as the user isinstructed to sit in chair 510 as microprocessor 550 instructs motors558 to cause the different displaceable components of chair 510 tochange positions, which in turn would cause the seated user to followthe different seated positions (lean forward without touching thebackrest, sit back and upright, sit back with a slight recline, thenmore recline until full recline is reached, and then stand up from thechair without using the armrests for support and then stand up using thearmrests for support. During this initial set up procedure, sensors 560would be carefully measuring pressure and microprocessor 550 would berecording the incoming pressure information at the different pressuresensors throughout the chair for each chair component position, asconveyed by the different motors.

According to another feature of the present disclosure, as shown in FIG.2, microphone 572 and speaker 570 are electrically connected tomicroprocessor 550 in a manner that is well known by those skilled inthe art. Microphone 572 can be used to pick up audible commands by theuser or to pick up useful sounds in the environment, such as an audiblecontrol sound that allows chair 510 to be controlled remotely, usingsounds at set frequencies. For example, microphone 572 could “hear” anddiscern the unique sound of a person typing and microprocessor 550 coulduse this information to hold off a scheduled reclining event until theuser finishes typing (since the user may not be able or want to typewhile reclined).

The above feature of using pressure sensors 560 to establish apressure-signature for the user at different chair orientations mayfunction with or without the use of motors 558 a, 558 b, 558 c. Ifmotors are not used, the movable components of a chair would movesimilar to how these components move in conventional adjustable chairs.Such “manual” movements are made by the user activating levers torelease mechanical locks and relying on the user's weight to forcemovement of a component against the action of a return spring. Forexample, should a user lean back in a chair, pressure sensors 560 wouldsense this (through a measured increase in pressure or force) andpressure sensors 560 could record these pressure or force readings whenthe user is at the reclined position.

It should be noted that pressure sensor is a term that includes any of avariety of sensors that measure applied force or pressure. A preferredtype of pressure sensor is a load cell, or strain gauge. A strain-gaugeis a transducer that is used to create an electrical signal whosemagnitude is directly proportional to the force being measured. Someload cells operate by measuring a change in resistance when a load isapplied and then generating an electric signal that is proportional tothe applied load. Other types, such as Piezoelectric load cells work onthe same principle of deformation as the strain gauge load cells, but avoltage output is generated by the basic piezoelectric material itselfand the voltage output is proportional to the deformation of load celland therefore also to the applied load. Regardless of the type ofpressure or load sensor that is used in the chair, the sensor must besensitive enough to reliably measure relatively slight changes inapplied load, as a user sits in chair 510.

Regardless if each or certain chair component movements are motor drivenor user driven, the inclusion of pressure sensors and a supportingcontrol circuit in a chair, as shown in FIG. 2 and as described abovecould be used to:

a) Create a digital signature for each user;

b) Keep track of the weight of the user over time;

c) Keep track of the user's posture overtime;

d) Determine the user's chair-position history; and

e) Determine if the user is accurately following a assignedchair-position schedule;

By creating a digital signature for each user, the control circuit wouldbe able to understand if the current user sitting in the chair has apressure-sensor profile stored in memory. If so, then the chaircomponents (when motor driven) could be automatically positioned to thatuser's preferred and desired chair positioning (overall height, backrestrecline lock or level of spring bias, seat cushion tilt, armrest height,etc.). Also, once the user is known, his or her personal chair-positionschedule could be uploaded and followed.

In use, and referring again to FIGS. 1 and 2, a purpose of the presentchair 510 is to encourage the user of the chair to sit in a manner thatprevents or discourages poor posture and related back pain, joint andcirculatory problems and improves the health and posture of the user.

According to the preferred embodiment, as described above, chair 510includes several displaceable components that can be moved to changeposition (within a range of movement).

Chair 510 preferably includes three modes of operation, automatic,semi-automatic and manual modes.

Automatic Mode:

In automatic mode, the displaceable components of chair 510 areautomatically moved at prescribed times following a schedule to bestmaximize the health, posture, and comfort of the user. By way of exampleof this operational mode, the user could be seated in chair 510 for 510minutes typing on the computer. An internal clock within microprocessor550 would indicate that a scheduled chair position is due. According tothe disclosure, the user would be notified that a change is imminent bycausing the component that will be changing position to gently undulateback and forth, or up and down with at a gradual and non-disturbing,non-vibration, rate, such as within 5 and 30 cycles per minute and at anamplitude of less than 5 inches of movement, depending on the component(this undulation is called a “whisperbreath”). Illumination from LEDs(not shown) and/or sounds generated by speaker 570 could also be used tofunction as an alert to the user, but the gentle undulation type alertis preferred. If the position schedule requires that the user recline intheir chair for 5 minutes, then the backrest would gently undulate forone or two full oscillations prior to the movement occurring, preferablybetween 5 and 20 seconds prior. The user will feel this undulation andunderstand that the chair's backrest is about to recline to a prescribedangle 30-40 degrees from vertical, for example. During the undulatingalert and thereafter (including during and after the backrest pivotsback to recline), the user can cancel the scheduled event in one ofseveral ways, including:

a) By rotating the chair back and forth about the post;

b) By rolling the chair on the floor mat;

c) By bouncing one or both legs up and down (lifted up by flexing his orher foot of the floor);

d) By tapping either armrest once or twice (depending how the system isset up);

e) By leaning back against the backrest and then leaning forward;

f) By tapping on the smart sit/stand desk (assuming the desk and chairare paired to each other through wireless connection);

g) By tapping onto a remote device that has been paired to chair 510,such as the user's smart phone, or another such device; and

h) By announcing a “Cancel” command verbally to the chair directly, orthrough the user's smart phone.

In this automatic mode, microprocessor 550 will follow a prescribedchair movement schedule that will try to get the user of the chair tocycle through chair body movements including reclining back, sittingupright with lower thighs, sitting upright with a raised thighs andstanding upright, every 20 to 30 minutes, as described above. If theuser cancels a particular chair-movement event, microprocessor 550 willrevise the schedule for that particular user to try to get the user tomove more while seated. The schedule will mesh with the sit/standschedule is a smart desk is also being used.

According to another feature of the disclosure, chair 510 is adaptiveand will learn the user's behavior and physical ability and willcontinuously adjust the positioning schedule accordingly. For example,chair 510 will keep track how close the user keeps to the preferredpositioning schedule. If the user tends to sit more often than stand,then the schedule will adjust to provide more sit time at first and thenslowly decrease the permitted sit duration so that the user can adjustto the new positioning and hopefully adapt too. Also, chair 510 can keeptrack of the user's schedule and seating habits, such as encouragingmore standing earlier in the morning and providing more sit upright timelater in the day. It should be noted, however, that although there issome room to adjust the positioning schedule, it is still important thatthe user moves to different positions, as described above regularly andif he or she cannot, then a manager may have to intervene and providethe user with additional help and support, as necessary.

If a stepper motor 558 a, b, c, is being used instead of smootherservo-type or rotary type motors, the resulting movement of eachdisplaceable component will be a bit jerky, since a stepper motor ismore like a rotary solenoid divided up into degrees of a rotation. Thejerky motion would be noticeable and subtle, but not annoying.Applicants' contemplate using this subtle jerky motion as a non-annoyingalert that a movement event is about to occur.

Semi-Automatic Mode:

In semi-automatic mode, a user operates user input 562 (buttons on anaccessible control panel, not shown) to instruct microprocessor 550 toactivate select motors 558 a-c to move a select chair component, asdesired by the user until the desired new position of the particularchair component is reached. For example, the user may decide to raisetheir armrest 529 and can push a button located on the armrest itself,or push a button located on a control panel (not shown), which willcause motor 558 a, b, c, that is associated with that armrestdisplacement mechanism to activate and displace the armrest to thedesired point in movement. Semi-auto mode means that the user initiatesthe move of a particular component, but electric motors 558 a-c performthe actual movement. A contemplated variation here is that pressuresensors located at various locations within chair 510, such as in lowerseat cushion 524 and backrest cushion 522 will sense sudden increasedpressure one, two or three times in a row, evenly spaced apart which iscaused by the user pushing back, for example, against the backrest. Thismovement acts as instructions for the control circuit to electricallydrive the backrest back to a prescribed angle, or until the userinstructs the control circuit to stop. Alternatively, the user can taponto their Stir sit/stand smart desk controller which is embedded in thesurface of the desktop. This action (or similar tapping action sequence)will cause the control circuit of chair 510 to perform the action,receiving the instructions from the desk by wireless communication 554.Another variation of this would include an image of the desk chair 510on either the display of the Stir sit/stand smart desk, their smartphone display, or on the user's laptop/PC computer display. The user caneither tap the part (component) of the chair that they wish to displaceor hold their finger on their touch screen, on the chair part they wantto move. This action will translate into an instruction to move thatpart, sent to chair 510 and received by wireless communication 554. Theuser simple releases the touch screen to stop the movement. If thescreen is not a touch screen, the user can use their mouse and cursor.

Manual Mode:

Manual mode means the user both initiates the move of a particularcomponent of the chair and then makes the actual move of the component.In manual mode, the components are mechanically disengaged from themotor and motor drive mechanism. Manual mode is similar to the movementof conventional chairs. This mode is preferably used only when battery552 depletes or another electrical failure occurs and the user requiresmovement before the battery is recharged, or the failure is corrected.

Monitors and Postural Rotation:

Applicants' acknowledge that if the user is using a computer with adisplay on their desktop, the viewing angle may be compromised by themovement of a part of chair 510, such as if the chair reclines. In thisinstance, the user could have difficulty viewing the display and workefficiency could decrease. Applicants' propose a display mount (notshown) that would be mounted on the user's desktop and would support theuser's monitor. The display mount would include two motors (or drives)that would allow the display to move up or down (closer or farther awayfrom the table top), and tilt up and down. The display mount, accordingto this disclosure, would be powered remotely and would include onboardcontrolling circuitry and wireless communication (or would be hard-wirecommunication connected to the smart desk). The display mount would bepaired with the smart desk, is one is being used, and chair 510. In use,as chair 510 moves, the chair's control circuit would send instructionsby way of wireless communication 554 to move the supported display up ordown or tilt up or down in an effort to reposition the display to alignwith the newly repositioned user's head.

In a further enhancement the monitor mount can periodically adjust(ideally automatically or semi-automatically) when a user is sittingupright in their chair between straight ahead of user which is oftencomfortable for the neck but can cause eye strain, and a second lowertilted position which is more ideal for the eyes but can cause some neckstrain. As noted it has been suggested by ergonomists that one's “nextposition in his or her best position” suggesting that there is not onesingle good position for a monitor.

In a further enhancement the monitor mount would adjust to result in theuser looking slightly to the left and slightly to the right (ideallyautomatically or semi-automatically) to support periodic healthyposition changes of the neck and spine. Additional actuators would beadded to enable this motion.

Conference Room Application:

The above-described disclosures directed to Chair 510 can be applied tomany different types of chairs, but a primary intended chair type is theoffice chair used at desks within an office setting. However, thesechairs can also be used in a conference room setting wherein severalchairs populate the perimeter of a large conference table. In thisapplication, all the desks and chairs used in the entire office could beconnected wirelessly to the company's server wherein all individualchair positioning and use information can be stored. Chair 510 canfurther include a simple reader (not shown), such as optical, magnetic,Bluetooth® or RFID, etc. This reader may be used to sense or otherwiseread information, preferably automatically, from an employee's securitycard (or other ID type card), or phone when the user sits at any chairwithin the company, including the chairs positioned around theconference table. In use, once the employee sits in any of the chairs,the selected chair will automatically identify the user and the onboardcontrol system will activate the various motors 558 a-c of the chair toposition all moveable chair components to align with the seated user'sstored preferences. This approach may also be applied in other instanceswhen many people use the same chair at different times such as in “desksharing,” which is also referred to as “hot-desking” in the furnitureindustry

Using Chair Movement for Alerts:

According to yet another feature of the present disclosure, differentmotors 558 a-c are selectively activated to move select chair componentsin preset movement patterns which could be single movement, slow orquick, or oscillatory and can repeat at spaced intervals. This allowschair 510, working with wireless connection to the company's server, theuser's smart phone, the user's computer, the user's smart desk, or othersimilar devices to communicate upcoming or current events to the seateduser in a non-disturbing manner. The user could assign (during setup)different types of chair component movements with specific types ofevent alerts. For example, microprocessor 550 could be instructed toactivate the chair's seat cushion motor 558 a-c in an up and downundulating movement with an amplitude of 2 inches peak-to-peak and aperiod of 4 seconds in response to an upcoming meeting, as listed in anappointment program operating on the user's smart phone, such as MSOutlook® provided by the Microsoft company of Redmond, Wash. 98052. Thefirst movement could indicate a 15 minute reminder prior to theparticular meeting. At 5 minutes, microprocessor 550 would interrogatesensors 560 and would learn, in this example, that the user is stillseated, and would then confirm that the meeting appointment remainsactive. Microprocessor 550 would then move the same component up anddown, but now at a quicker frequency, such as 2 second cycles and withan amplitude of just 1 inch and would increase the duration for 5seconds. This action provides the user of an alert of higher urgency.The user may cancel the alert sequence for the particular appointmenteither on his or her smart phone or by moving in a preset manner in thechair within a preset time limit after the start of the alert, such asby rotating the chair about post 514 clockwise and counterclockwisetwice within 510 seconds after the beginning of the alert sequence.Sensors 560 would detect this rotation and microprocessor 550 wouldcancel further alerts for this scheduled appointment.

Other chair components can be moved in a similar manner to remind theuser of other events.

An important feature of the present disclosure is that chair 510 is“smart” and connected to the user's smart devices. The chair accordingto the disclosure effectively becomes a giant computer mouse in that theuser can move different components of chair 510 to perform specificcomputer related tasks, such as cancelling a meeting alert. The chaircan also receive information from other smart devices and the Internetand the company's server to understand the seated user, his or herprofile, preferences, and schedule etc. and respond automatically ifnecessary, to better the user's health and workplace efficiency.

Referring to FIGS. 4 and 5, and according to another embodiment of thepresent disclosure, a seating structure 310 is provided having a dollystructure 312, from which a post 314 upwardly extends. A yoke assembly316 includes a vertically disposed piston 318 which is slidably securedto post 314, as understood by those of skill in the art. A backrest 320is pivotally secured to a portion of yoke assembly 316. A seat portion324 is pivotally secured to a portion of yoke assembly 316. As is wellknown by those skilled in the art, dolly structure 312 includes 5radially disposed legs 326, each having a caster wheel 328 pivotallyattached to a remote end 330. A left and right side armrest 329 aremounted to yoke assembly 316 by a telescoping connection and areselectively vertically displaceable.

As shown in FIG. 6, and according to the disclosure, seating structure310 further includes a microprocessor 342, memory 344, wirelesscommunication 346 and an actuator driver circuit 348, collectivelycalled a control circuit 340. Seating structure 310 further includesuser input controls 350 (buttons, knobs, etc.), positioning sensors 352,a battery 354 and actuators 356. All these components are mountedthroughout the seating structure and are electrically connected tomicroprocessor 342.

As is understood by those skilled in the art, backrest 320 is pivotallysecured to yoke assembly 316 and may pivot back (or recline) between agenerally straight upright position (no recline—about 90° with respectto seat portion) and a predetermined full recline position, defining anangle of about 130° with respect to the seat portion 324. As withconventional seating structures of the type that include a recliningbackrest, backrest 320 is biased to the upright no-recline position by aspring-bias, which may be provided by compression, tension, torsion, oraxial mechanical springs, a pneumatic piston arrangement, or anothermechanism, as understood by those skilled in the art.

In conventional adjustable seating structures, the magnitude of thisrecline-spring-bias may be controlled by a lever (not shown). Also, hardstop points may be selected using knob 370 that prevent backrest 320from reclining past a fixed preset angle. This allows the user to decidethe maximum degree of recline the backrest will move, when he or sheleans back in the chair. As mentioned above, often the user keeps thepreset recline angle to a no recline angle of about 90°, straightupright. Unfortunately, when the user does this, applicants' researchindicate they often forget the need to alleviate the strain on the discsof their vertebrae and to return their lumbar curve back to its desiredrest position and slouch. In other words, most users don't think aboutreclining when they are working and miss out on the health benefits ofcycling regularly between reclining, sitting upright and standing every20 minutes or so throughout the day.

Positioning sensors 352 are positioned at different locations on seatingstructure 310 and are used to detect user presence (is there a usersitting in the chair), if the user is seated upright, the force the useris exerting against backrest 320, and the angular position of backrestwith respect to seat portion 324. The type of sensor may vary dependingon what it is required to sense, but the sensors are well known and maybe conventional. Strain-gauge type sensors may be mounted, for example,within seat portion 324 to detect the user's weight (and therefore theuser's seated presence) and also the force the user is exerting againstbackrest 320. Optical-coupler sensors or hall-type sensors may be usedto determine the angle of backrest 320. Any type of sensor may be usedhere, as understood by those skilled in the art, without departing fromthe disclosure.

Manual Mode (Remind):

According to a first manual mode of operation of this embodiment of thedisclosure, at prescribed times, following a schedule stored in memory344, microprocessor 342 will first interrogate the sensors to determinecertain values, including:

a) If there is a person seated on seat portion 324;

b) The force being exerted against backrest 320;

c) The current angle of backrest 320; and

d) The preset maximum reclining angle (set by the user).

At prescribed times, based on the schedule, if there is a person seatedand the current angle of backrest is less than the prescribed andsuggested recline angle, microprocessor 342 will send an alert (fromalert generator 358) to the seated user, such as a vibration, a tactileimpulse, a movement of a chair component, illuminating lights, orgenerating sounds or a voice, to indicate that a reclined position issuggested to maintain good posture and health. This reminder to the usermay also be in the form of a generated alert that will appear on hiscomputer screen, or even on the user's smart phone, as a pushnotification text or alert. The user may cancel the request by voice(which would be “heard” by a connected microphone 360), pushing a buttonon input control 350, moving one of the chair components (includingrolling the chair on the floor mat) a prescribed number of times, suchas two or three times, tapping on a chair component, such as armrest 329(picked up by a sensor) or using their smart device (such as their cellphone, computer, or other) which is connectable by wirelesscommunication 346 (Bluetooth®, Wi-Fi_(——————)33, etc.). According tothis mode, and the disclosure, the user is only reminded to changeposition (recline). The recline tilt lock (or hard-stops) will not beautomatically released. If the user does not cancel the alert orreminder, control system 40 will continue to remind the user at presetintervals. If the user does heed the reminder and manually releases therecline tilt lock, he or she will push against backrest 320 (against theaction of the spring-bias) until the desired recline angle has beenreached. Sensors 352 will detect the angle and will either confirm thatthe recline angle is following the recommended angle (acceptable) withanother confirmation alert, or with another alert that indicates thatthe user must further recline. The user may still select the maximumangle of recline.

After a prescribed period of time at the reclined position, controlsystem will alert the user that the reclining period has ended and thatbackrest 320 may be (or should be) returned to the full uprightposition, or to a different position, such as the previous reclineposition set by the user. The user may again cancel the alert and remainin the reclined position, as desired.

Automatic Mode (Remind and Disengage):

According to the disclosure, in a semi-automatic mode, control system340 performs the same reminding process as in the above-described manualmode, but now the user is being reminded that unless he or she cancelsthe event, any tilt-stop or hard stops will automatically release andbackrest 320 will be released and the user will be allowed to lean backto a reclined position. In this mode, backrest 320 does notautomatically recline, but only releases any stops that have been presetand subsequently allows the user to recline to a greater degree, thedegree to which may be selected by the user in an interface such as asmart-phone connected via Bluetooth. If the user remains seated uprightduring this time, sensors will detect this and in response,microprocessor 342 will generate alerts, as before, to the user thatmust be cancelled. The behavior patterns of the user may be aggregatedand transmitted to a usage dashboard or otherwise aggregated for laterreview. Once backrest 320 reaches the prescribed angle of recline(according to the event schedule), applicants contemplate lockingbackrest 320 in the reclined position. The seated user may activate acontrol or voice command to release the fully reclined lock at any time.

After a prescribed period of time in the reclined position, controlsystem will alert the user that the reclining period has ended and thatbackrest 320 will either be unlocked (if that feature is set) or thealert is merely a reminder to the user that the recline time has endedand that the user may raise (with the action of the spring-bias) to anupright position. If the user remains reclined, alerts will continue,but the user may again cancel the alert and remain in the reclinedposition. Control circuit 340 causes recline lock to automatically matchthe lock settings before the recline. If it was set to lock, then thelocked setting will be reset. Same with unlocked.

In each mode, the user determines the maximum angle of recline.

Training Mode:

Since seating structure 310 can be paired with a separate smart device,applicants contemplate using the smart device to help educate the userhow to use the chair—a kind of real-time interactive instruction manual.

In use, when a user touches a control on the chair, for example, aheight adjustment lever, this action would be sensed by sensors and themicroprocessor would work with an app running on the user's smart-phoneto explain how the height adjustment works, with video, graphics andtext instructions. When the user does adjust the height of the chair,according to one embodiment, a graphic located on the screen of thesmart-phone simultaneously show the seat move in the same direction.

This training tool works with different alerts. In such instance, if theuser feels three vibrations in the cushion of their chair, in thetraining mode, the microprocessor on the chair can communicate to asmart device to push instructions of what the three vibrations means.This would continue for a period of time and automatically shut off.Alternatively, the training tool can be used to detect how the userresponds to a particular alert sequence, if applicable, and can use thisinformation to determine if further training is required.

Similarly, the user can tap on the screen of their smart-phone over aparticular graphic component of the chair and the information would betransmitted to the microprocessor on the chair which would cause thatselected component to move or vibrate, to indicate where a particularcomponent is located.

Feature Module:

This disclosure provides a chair that includes an easily accessible andreplaceable component (a “module”). The module can be positionedanywhere on the seating structure, but is preferably secured (such assnapping into place or being inserted like a cartridge into a snug-fitrecess or cavity) to the backrest of the chair, as shown in FIG. 9. Themodule includes any of several features including massaging motion tomassage the user's back, vibration (or mechanical impact) which mayfunction as an alert to the user, heat and transforming lumbar support,as detailed below.

Referring now to FIGS. 4, 7 and 8, a chair 310 is shown including adolly assembly 312, a post 314 attached thereto and supporting a yoke316. A seat portion 324 is attached to yoke 316. A backrest 320 ispivotally attached to yoke 316 and includes a module cover 322 which ispivotally attached to backrest 320, pivotal between a fully closedposition, shown in FIG. 4 and an open position, shown in FIG. 9. Modulecover 322 is securable to backrest 320 when in the closed position by alatch 318, for example. When module cover 322 is in the open position, amodule 326 can be accessed, removed and replaced by the same module orother ones. Module 326 preferably includes its own power supply (such asbatteries, not shown), and is controlled by wireless communication(e.g., Wi-Fi_(——————)33, Bluetooth®) to a remote smart device (e.g.,smart-phone, remote control unit, a laptop computer, tablet, or smartdesk).

One type of application for a module is messaging which includes anelectromechanical actuator that can be activated to create singletactile impulses, preferably to the back of the user, a sequence oftactile impulses, or a pattern of pulses generated at prescribedfrequencies, amplitudes, and durations. These tactile patterns are usedto communication information to the seated user in a subtle andnon-disturbing manner. The electromechanical actuator can be a solenoid,a motor rotating an offset weight, linear motion actuators, rotationalvibrators, pendulum vibrators and oscillators, or similar. An onboardmicroprocessor controls the electromechanical actuator to generate apredetermined tactile message to the user's back. Since themicroprocessor is paired with the user's smart device, such as his orher phone, and laptop, the tactile messages could provide a reminderthat a meeting is starting in 10 minutes, for example. Another proposeduse would be to have the tactile messaging convey the passage of time,by transmitting a single impulse, for example, every half hour of time,or at lunch time, etc.

This messaging module could include connections to automatically connectwith electrical components already installed in a chair, or couldinclude all the required components, all self-contained, including, abattery, a controller circuit (microprocessor, memory, etc.), an impulsegenerator and a wireless communication circuit, such as Bluetooth®.

To install the module, in the example shown in the figures, the usersimply inserts the module into the cavity of the module door. The dooris then closed.

The module feature can be remotely controlled by the user's smart deviceso that exposed controls on the module itself are not necessary.

Another proposed module includes a section that can expanded or contractagainst the user's back so that it can selectively provide lumbarsupport. Once example would be to control the inflation or deflation ofa sealed fluid bladder.

Another proposed module includes a heating element and a strongmassaging oscillation generator (not shown). This module would providelocal heat and massaging on demand by the user. Again, the user merelyhas to select the option and duration on his or her smart device.

Add-on Tilt Control Unit:

Referring to FIGS. 9 and 10, a seating structure 200 is shown having aseat portion 206 mounted to a post 204. Preferably a knob 202 (havingexternal teeth) is provided to selectively release the recline lock,allowing the user to recline the backrest of the seating structure.Other mechanisms for actuated rotation may be used here in place of theknob, as understood by those skilled in the art. According to thisdisclosure, an add-on tilt-control unit 208 is provided which includes ahousing 212 that houses an actuator (not shown), a drive gear 210, abattery (not shown), and controlling circuitry (not shown, but the sameas shown in FIG. 6 and described above. Add-on tilt control unit 208would be custom made to fit each seating structure 200, as required. Inthis example, add-on tilt control unit 208 is designed and shaped tosnuggly secure to seating structure 200 around knob 202, as shown in thefigures. As shown in FIG. 11, gear 210 is sized and positioned to engagethe teeth of knob 202. Gear 210 is mechanically attached to the actuatorof the add-on tilt control unit 208 so that when actuator is activated,gear 210 will rotate and, in turn, rotate knob 202, in a direction thatcauses the factory-installed tilt-lock mechanism that is located withinseating structure 200.

Once installed to seating structure 200, as shown in FIGS. 9 and 10, theoperation of add-on tilt control unit 208 is the same as above-describedembodiments. Depending on the mode, control circuitry, powered byonboard battery, announces to the user that the position-change scheduleis recommending a position change. If the recommended change is arecline, the user will be so notified by an appropriate alert, asdescribed above in earlier embodiments. The user may decline by movingthe chair side to side or pivoting the seat 206 about post 204 or useother input methods described in this specification. Sensors withinadd-on tilt control unit 208 will detect this and reschedule theposition-changing event. If the user accepts the change (by doingnothing), the add-on tilt control unit 208 will activate the internalactuator and gear 210 so rotate knob 202 and release the recliningtilt-lock. The user will then push back against the backrest to areclined position. After a prescribed period of time, the user willagain be alerted and he can again move back to a different position. Ofcourse, other tilt-lock and tilt-release mechanisms may be used inconnection with this embodiment of the disclosure, as understood bythose skilled in the art.

Health Management Light:

According to this disclosure, an LED is mounted to the seating structureor nearby desk and will illuminate when the user (employee) is activelyfollowing the prescribed position-change schedule during reclining. Thiscommunicates that that the user is reclining for health managementreasons and addresses cultural inhibitions to reclining in certainoffice environments that applicants have identified in their research.Control circuit 40 can also instruct a nearby smart-device to offer asimilar indication. A separate device could be positioned on the deskand instructed to illuminate during this time period of reclining orwhen standing to provide encouragement help overcome cultural barriersto these changes in work styles.

Sit-Stand Desk with Remote Height Management:

By way of overview and introduction, the present disclosure concernsimprovements of managing sit-stand desks and in turn, positivelyinfluencing healthy behavior of workers. The embodiments discussed beloware not intended to be exhaustive or limit the disclosure to the preciseforms disclosed in the following detailed description. Rather, theembodiments are chosen and described so that others skilled in the artmay utilize their teachings.

Referring to FIGS. 11-13, an exemplary installation of six sit-standdesks are shown. Each desk 412 includes a worktop 414, and motorizedlegs 416. According to a first embodiment of the disclosure, motorizedlegs 416 are controlled by a local control unit (not shown) secured toworktop 414. A user of each desk 412 can use the control unit to powermotorized legs 416 to move worktop 414 up and down to a desired height.According to this disclosure, each control unit of each desk 412 isconnected to a local master controller 418. The connection can be eitherhardwired, such as using a CAT-5 communication cable 420 shown in thefigures, or wirelessly, using Bluetooth®, Wi-Fi, or another suitablesystem.

According to one embodiment of the disclosure, local master controller418 includes a timing circuit (not shown), an Internet connection (notshown) and a control panel (not shown). Local master controller 418 isin electrical communication with each of desks 412 and may change theheight of each worktop 414 of each desk 412 either individually, inpreselected groups, or all simultaneously. The height change to any, orall worktops 414 (that are connected to local master controller 418) canbe controlled manually, by an operator using the control panel (notshown) located at local master controller 418. Alternatively, the heightchange commands to select desks or all desks may be generatedautomatically, following a timing schedule, such as:

Which Move to When should On which desk(s)? what height? this occur?days? ALL 44 inches 8:00 PM M-F

In the above example, the desktops of ALL the desks controlled by localmaster controller 418 are programmed to reposition to a new set heightof 44 inches above the floor at 8:00 PM, each night, Monday thru Friday,unless instructed otherwise. According to another embodiment of thedisclosure, sensors (not shown) located at each desk 412 detect thepresence of a user at a desk. Such sensors may be proximity, pressure(used in connection with a pressure mat), infrared (e.g., thermal),optical, capacitive, or similar, as is well known by those skilled inthe art. If it is determined (through sensing) that a particular desk isbeing used at the time of a scheduled height change (e.g., at 8:00 pm,Monday), an “in use” signal will be sent to, or read by local mastercontroller 418 at the time of the planned event. In such instance, allother, unoccupied desks will proceed to move to the new scheduled height(e.g., 44 inches), but the occupied desk in this example will remainunchanged and in full control by the immediate user. Once it isdetermined (by scheduled interrogation of local master controller 418)that the user no longer occupies the particular lone desk, local mastercontroller 418 will instruct that desk to raise its worktop 414 to thescheduled height (e.g., 44 inches) to match the height of the otherdesks in the group.

According to the present disclosure, if a user returns to a desk afterleaving and his or her desk has already been raised to a new scheduledheight by local master controller 418, the user may simple return thedesktop height to any desired height using the controls at the desk.Local master controller 418 will periodically interrogate that desk (andany other desk which is forced off the master height schedule by theuser) to determine through electronic sensing if the user has left. Atsuch time, local master controller 418 will again reset the height ofthe now unoccupied desk to match the height of the others, or to matchthe prescribed height of that desk, according to the preset schedule.

In one embodiment, the height of each desk is programmed to move to aset height that is common to all desks (i.e., all desks will move to thesame height value) in the controlled group, as representedillustratively in FIG. 13. According to another embodiment of thedisclosure, each desktop is moved to the “stand” height set by andspecific to each respective user (their highest worktop setting). Inthis embodiment, each desk will raise to a specific max height which mayor may not be equal to the other desks in the group.

An important benefit to having all sit-stand desks pre-positioned at the“stand” position in the morning when the users arrive is that doing soencourages the users to actively use the sit-stand desk to benefit theirrespective health. Applicants have learned that there is a psychologicalbenefit generated when a user arrives and sees their desk in the standposition. The user is more likely to start their work standing and ismore likely to continue using the sit-stand schedule of their own deskthroughout the day. By setting their sit-stand desk to its “stand”position at the start of the day, the user is reminded of the desk'smain purpose—to encourage a healthy lifestyle and behavior.

Another benefit to having the worktops 414 all rise to a high setting atnight, is that doing so provides better access for the cleaning crew toclean under and around each desk.

The present system could also lower each desk to a low height if deskincludes sensors that allow the desk to stop in respond to contact withan obstruction or sense obstructions and not descend. This is not alwaysa preferred approach so some desks only include functions that onlyautomatically raise the desk.

It is not uncommon, in some installations to have hundreds of sit-standdesks arranged and online, in a single large group (such as at acall-center). In this environment, it is not uncommon for several ormany desks to be unoccupied for extended periods of time, as differentfactors change the schedules and populations of workers throughout thegroup. Having the worktop 414 of some or many unused desks in the roomremain in a “stand” or high-setting position for extended periods oftime may be considered unsightly, or may otherwise interfere with dailyoperations as people move about in the room and between the desks. Toaddress this concerns and according to another feature of thisdisclosure, user-data history for each desk and sensors located at eachdesk could be used to determine the occupancy of any desk in the group.If it is determined that any desk has not been occupied for apredetermined period of time, for example, at least 2 days in a row,local master controller 418 would flag those specific desks to remain ata low, “seated” height until the desks are used once again. By doingthis, the present system would not force the worktops 414 of unuseddesks to remain raised at the “stand” or max positions for extendedperiods of time during work hours.

System for Remotely Powering Seat Structures:

Referring now to FIGS. 14-18, a system for remotely powering a seatstructure is shown, including a chair 450 having a base 452, a centralpost 454, a seat portion 456, a backrest 458 and armrests 460. Chair 450is shown positioned on a floor mat 462 in FIG. 14. As described ingreater detail below, floor mat 462 includes at least one embeddedprimary induction coil 464 which is electrically connected to a chargingcontrol circuit (not shown) and is powered by line voltage (plugged intoa nearby outlet—not shown).

Chair 450 may be conventional in structure in that base 452 includes anumber of radially disposed, equally spaced legs 466 (usually five)radiating from central post 454, which is vertically disposed. Attachedto the remote end of each leg 466 is a caster wheel 470, collectivelyallowing the chair to selectively roll along floor mat 462. Seat portion456, backrest 458, and armrests 460 are either directly or indirectlymechanically supported by central post 454 and in turn support theseated user. In conventional use of chair 450, as is well known, a usersits on seat portion 456, leans back, as desired against backrest 458and supports his or her arms on armrests 460, again as desired. The usermay push their feet against floor mat 462 to cause the entire chair 450to roll on caster wheels 470 along the floor mat in any planardirection, as necessary.

According to the present disclosure, and referring to FIGS. 15-18, asecondary induction coil and drive assembly 480 is secured to theunderside of base 452. Assembly 480 includes an upper housing 482 and avertically displaceable lower housing 484. Lower housing 484 supports asecondary induction coil 486, a drive wheel assembly 488, and locationsensors 490. As mentioned above, lower housing 484 may be selectivelydisplaced vertically with respect to upper housing 482, as describedbelow. However, lower housing 484 is preferably snugly slidably engagedin a telescoping manner with upper housing 482, allowing relativevertical movement, but minimal relative lateral or transversedisplacement. Lower housing 484 mechanically supports drive assembly480, which, although not shown in great detail, includes a drive motorconnected to a drive wheel 492 and drive circuitry. Drive motor (notshown) and drive wheel 492 are mounted to a pivotal frame (not shown)which can rotate about a central axis. A steering drive (not shown) ismounted within lower housing 484 and connected to the pivotal frame (notshown). Steering drive is connected to drive circuitry.

An actuator (not shown) is mounted to either lower housing 484 or upperhousing 482 and is used to displace lower housing 484 with respect toupper housing 482 in a controlled manner. This actuator is preferably aservo type drive motor, but may also be a linear drive motor orsolenoid, or a drive mechanism used in combination with an over-centerspring arrangement. Regardless of the type of actuator used, thefunction of the actuator is to move lower assembly 484 between a lowerposition (shown in FIG. 18), wherein drive wheel 492 frictionallyengages floor mat 462 and secondary induction coil 486 becomesimmediately adjacent to the upper surface of floor mat 462, and an upperposition (shown in FIG. 17), wherein drive wheel 492 and secondaryinduction coil 486 are remote from floor mat 462, as described ingreater detail below.

As shown in the operational schematic of FIG. 14, a control circuit 600includes a microprocessor 602, memory 604, wireless communication 606and a battery 608. Control circuit 600 is located on chair 450 in anappropriate (preferably accessible, but hidden) location. Microprocessor602 is connected a motor driver circuit 610, which in turn is connectedto the above-described drive motor that powers drive wheel 492 andsteering drive (not shown). Battery 608 is an appropriate rechargeablebattery and is used to power all electronic components used on chair450, including microprocessor 602, memory 604, wireless communication606 and allow drive actuators described herein. Battery 608 is alsoelectrically connected to an induction charging control circuit 612.Positioning sensors 490 are connected to microprocessor 602 to providepositioning information of chair 450 on mat 462, as described in greaterdetail below.

Referring to figure FIG. 18, a section of floor mat 462 is shownincluding a plurality of lines 620. The lines are preferably printedonto mat 62 and thereafter coated with a protective coating so thatlines 620 will not wear out during use. Lines 620 are sensed by sensors490 and used to help control circuit determine the exact location ofchair 450 on mat 462. Lines 620 can vary in width, and/or vary inspacing therebetween. This controlled variation in either line width orline spacing is accurately measure by sensors 490, similar to how aconventional laser mouse reads a mouse pad to determine relativelocation and movement. As explained below, when lower assembly 484 ispositioned in the lower position (as shown in FIG. 18), sensors 490become immediately adjacent to mat 462 and lines 620. As chair 450 ismoved across mat 462, sensors 490 move across lines 620 and measuretheir unique characteristics, such as line width and line spacing andsend this information to microprocessor 602 during operation, asdescribed below. In this embodiment, sensors 490 are laser emitter andreceiver type, but sensors 490 may be other types, including infrared ormagnetic (Hall sensors), in which case, lines 620 would be made from amagnetic material so that they would be detectable by the Hall typesensors.

In use of chair 450, battery 608 is initially fully charged and anyelectrically-powered accessories of chair 450 can be used throughout theday by a user. Microprocessor 602 carefully measures the charge ofbattery 608, as it discharges. When the charge remaining on battery 608reaches a certain level, microprocessor 602 will activate an audible(sound), visual (LED), or tactile (vibration) alert to the user,indicating that the battery is low and that charging is required forthat night. It is preferred that control circuit will charge battery 608frequently enough to always allow the user with full use of allelectrical accessories during each day. When battery 608 requirescharging and the user is so alerted by microprocessor 602, the user may(if he or she remembers) manually position chair 450 to align overprimary charging coil 464 located in mat 462. Since charging coil 464 isembedded within mat 462, a visual mark (not shown in the drawings) ispreferably provided on the mat surface so that the user may easily seecoil 464 during chair alignment. If the user does manually move chair450 over primary coil 464, the user will activate a button or switch onchair 450 (not shown) which will cause control circuit to deploy lowerassembly 484. This will cause secondary coil 486 to become immediatelyadjacent to primary coil 484. In such instance, a charging circuit (notshown) located within mat 462 will detect that the two coils are alignedand will activate primary coil 464 (allowing current to flowtherethrough). As is well known, the current flowing in primary coil 464will induce a charge and current to flow in the adjacent second coil486, which will in turn be used to charge battery 608 located on chair450.

Should the user forget to move chair 450 into the coil-aligned chargingposition, control circuit 600 will do it automatically. Once batterycharge passes a predetermined threshold, and the time of day reaches apredetermined time (e.g., 9 PM), and sensors detect that a user is notseated in seat rest 456 (by measuring load thereon) microprocessor 602will activate motor driver 610 to drive actuator (not shown) to movelower assembly 484 from its raised and stowed position, shown in FIG.17, to its lowered position, shown in FIG. 18. In the lowered position,drive wheel 492 will frictionally contact the upper surface of floor mat462.

Once drive wheel is fully lowered, control circuit will power the motorattached to drive wheel 492 causing chair 450 to roll about mat 462.During this initial drive period, sensors 490 located on the lowersurface of lower assembly 484 will accurately read lines 620 locatedwithin mat 462. This detection and reading of lines 620 will allowmicroprocessor 602 to determine the chair's location on mat 462.Microprocessor 602 will then control drive motor and the steering motorto effectively move chair 450 so that secondary induction coil 486aligns with primary induction coil 464, allowing charging to commence.

Once charging completes (either battery 608 is fully charged or after aprescribed time period), an appropriate motor will be activated toreturn lower assembly from its deployed position back to its retractedand stowed position.

Should chair 450 be moved when lower assembly 484 is in its deployedposition, sensors 490 will immediately detect this and microprocessor602 will instantly raise lower assembly 484 so that drive wheel 492 nolonger contacts floor mat 462. After a period of time, as long as chair450 is not moving and no person is detected seated thereon, lowerassembly 484 will again be deployed, drive motor will again activate sothat sensors 490 can determine the chair location on mat 462 and controlcircuit 600 can again drive motors to move it back to the charginglocation so that charging may continue.

While this disclosure has been described as having an exemplary design,the present disclosure may be further modified within the spirit andscope of this disclosure. This application is therefore intended tocover any variations, uses, or adaptations of the disclosure using itsgeneral principles. Further, this application is intended to cover suchdepartures from the present disclosure as come within known or customarypractice in the art to which this disclosure pertains.

While the invention may be susceptible to various modifications andalternative forms, specific embodiments have been shown by way ofexample in the drawings and have been described in detail herein.However, it should be understood that the invention is not intended tobe limited to the particular forms disclosed.

Thus, the invention is to cover all modifications, equivalents, andalternatives falling within the spirit and scope of the invention asdefined by the following appended claims.

To apprise the public of the scope of this invention, the followingclaims are made:

What is claimed is:
 1. A system for guiding a user while changing ajuxtaposition of one furniture component with respect to anotherfurniture component on a furniture assembly, the system comprising: asensor for sensing a position of a first component with respect to asecond component; an indicator for indicating when the position of thefirst component with respect to the second component should be changedby the user from a current position to another position; a controlmechanism activatable by the user for changing the position of the firstcomponent with respect to the second component; a processor linked tothe sensor and the indicator and programmed to use sensor signals totrack the position of the first component with respect to the secondcomponent and to provide periodic first reminders to change the positionof the first component with respect to the second component from thecurrent position to another position, the processor continuing to trackthe first component position as the user moves the first componenttoward the another position and, when a repositioning stops short of theanother position, controlling the indicator to generate a first alertthat the repositioning should continue until the another position isachieved.
 2. The system of claim 1 wherein the processor is furtherprogrammed to, upon the first component reaching the another positionwith respect to the second component, presents a second alert indicatingthat the another position has been achieved.
 3. The system of claim 2wherein the indicator presents at least one of an audible first reminderand a visual first reminder.
 4. The system of claim 2 wherein theindicator presents a haptic first reminder.
 5. The system of claim 4wherein the haptic first reminder includes at least some movement of thefirst component wherein the first component is in contact with the user.6. The system of claim 4 wherein each of the alerts is also a hapticreminder.
 7. The system of claim 4 wherein the haptic first reminder ispresented by moving the first component with respect to the secondcomponent.
 8. The system of claim 1 further including a motor fordriving the first component with respect to the second component whereinthe control mechanism controls the motor.
 9. The assembly of claim 8wherein the control mechanism includes a sub-component of the firstcomponent.
 10. The system of claim 1 wherein the first component is abackrest of a chair and the second component is a seat.
 11. The systemof claim 10 wherein the current position and the another position arefirst and second angles of recline between the backrest and the seat.12. The system of claim 11 wherein the indicator is a first indicatorand the system includes a second indicator, the first and secondindicators spatially associated with the first and third components,respectively.
 13. The system of claim 1 wherein the furniture assemblyfurther includes a second sensor, a third furniture component and afourth furniture component, the second sensor for sensing a position ofthe third component with respect to the fourth component, the processoralso linked to the second sensor and further programmed to use secondsensor signals to track the position of the third component with respectto the fourth component and to provide periodic second reminders tochange the position of the third component with respect to the fourthcomponent from a current position to another position, the processorcontinuing to track the third component position as a user moves thethird component toward the another position and, when the repositioningof the third component stops short of the another position, controllingthe indicator to generate a second alert that the repositioning of thethird component should continue until the another position with respectto the fourth component is achieved.
 14. The system of claim 13 whereinthe first indicator is a haptic indicator that moves the first componentto provide the reminder to change the position of the first componentand the second indicator is a haptic indicator that changes the positionof the third component to provide the reminder.
 15. The system of claim1 wherein the control mechanism controls a lock between the first andsecond components and wherein, after the lock is released, the userapplies a manual force to the first component to move the firstcomponent toward the another position.
 16. The system of claim 1 whereinthe furniture assembly is a first furniture assembly and wherein thesystem further includes a second furniture assembly that is paired withthe first furniture assembly, the indicator on the second furnitureassembly.
 17. A system for guiding a user while changing a juxtapositionof one furniture component with respect to another furniture componenton a furniture assembly, the system comprising: a sensor for sensing aposition of a first component with respect to a second component; anindicator for indicating when the position of the first component withrespect to the second component should be changed by the user from acurrent position to another position; a control mechanism activatable bythe user for changing the position of the first component with respectto the second component; a processor linked to the sensor and theindicator and programmed to use sensor signals to track the position ofthe first component with respect to the second component and to provideperiodic first reminders to change the position of the first componentwith respect to the second component from the current position toanother position, the processor continuing to track the first componentposition as the user moves the first component toward the anotherposition and, when a repositioning stops short of the another position,controlling the indicator to generate a first alert that therepositioning should continue until the another position is achieved,the processor providing the first reminder by moving the first componentwith respect to the first component to generate a haptic first reminder.18. The system of claim 17 wherein the processor is further programmedto, upon the first component reaching the another position with respectto the second component, presents a second alert indicating that theanother position has been achieved.
 19. The system of claim 18 whereineach of the alerts is also a haptic reminder.
 20. The system of claim 18further including a motor for driving the first component with respectto the second component wherein the control mechanism controls themotor.
 21. A system for guiding a user while changing a juxtaposition ofa backrest with respect to a seat on a chair assembly, the systemcomprising: a sensor for sensing a position of the backrest with respectto the seat; an indicator for indicating when the position of thebackrest with respect to the seat should be changed by the user from acurrent position to another position; a control mechanism activatable bythe user for changing the position of the backrest with respect to asecond component; a processor linked to the sensor and the indicator andprogrammed to use sensor signals to track the position of the backrestwith respect to the seat and to provide periodic first reminders tochange the position of the backrest with respect to the seat from thecurrent position to another position, the processor continuing to trackthe backrest position as the user moves the backrest toward the anotherposition and, when a repositioning stops short of the another position,controlling the indicator to generate a first alert that therepositioning should continue until the another position is achieved,the processor providing the first reminder by moving the backrest withrespect to the seat to generate a haptic first reminder.